3-1/2 M3000 4-BOLT FLANGE EXPANSION

The 3 1⁄2" M3000 4-Bolt Flange Expansion Bearing is Moline Bearing Company part 19611308: an Even-Lok™ mounted spherical roller bearing in the expansion position. It is fitted with a standard double lip contact seal and a single collar, Even-Lok insert, in a solid Class 30 cast iron housing with a standard painted finish.

It carries a genuine SKF® Explorer spherical roller insert and locks to the shaft with Moline's Even-Lok™ concentric system, which grips nearly 360° of the shaft instead of at set-screw points, reducing fretting and slippage. A Hex-L key for mounting and dismounting ships with it. M3000 housings are made in the USA, and the units are assembled here.

It ships assembled, adjusted, sealed and pre-lubricated with lithium complex grease, so it mounts straight from the box with no adjustment or cleaning.

Ratings

The dynamic load rating is 65,200 lbf and the static load rating is 76,400 lbf. Maximum speed is 2,100 rpm with the standard double lip contact seal fitted, and the seal is rated for 0° to 250°F. The insert accepts up to 1.5° of angular misalignment. Set screws torque to 1,325 in-lbs. The grease fitting is 1/8-27 NPT.

Mounting dimensions

• Bolt hole centers: 6 23⁄32 in
• Bolt circle diameter: 9 1⁄2 in
• Bolt size: 3⁄4 in
• Flange: 8 3⁄8 × 8 3⁄8 in
• Length through bore: 3 25⁄64 in
• Shipping weight: 35 lb

The full dimension table and the datasheet drawing are above.

This configuration

• Expansion. This position lets the shaft move lengthwise as it heats and grows. Pair it with a non-expansion bearing at the other end. The matching non-expansion unit for this shaft size is 19711308.
• Standard Double Lip Contact Seal. Two lips in series, so the second continues to seal if the first is compromised. A step up in dirty conditions.
• Single Collar. One locking collar secures the insert to the shaft. Standard for unidirectional rotation and steady loads.
• Even-Lok. Moline's concentric locking system, which clamps the insert evenly around the shaft rather than at set-screw points. Improves concentricity and holding power versus set screws.

The same size is also built as 19611308L (labyrinth seals).

Replacement parts

The bearing insert is ABSY 22218-308, and the housing on its own is Moline Bearing Company part 11121307. Open end cap 18621308 and closed end cap 18620307 fit this housing.

Applications

M3000 units are for drives that need expansion and misalignment capability, or where vibration, slippage or fretting corrosion are present. Moline Bearing Company lists conveying, screening, air handling, industrial laundries and high-speed fans among the industries that run them. It is dimensionally interchangeable with comparable spherical roller bearing units, including Moline's M2000 line.